Note4Students
From UPSC perspective, the following things are important :
Prelims level: Global Cooling Pledge
Mains level: NA
Central Idea
- At the COP28 climate summit on November 6, 63 countries, including the US, Canada, and Kenya, signed the world’s first pledge to reduce cooling emissions.
Global Cooling Pledge
- Term: This pledge aims to cut cooling emissions by at least 68% by 2050, addressing a significant source of greenhouse gases.
- Current Contribution to Global Emissions: Cooling emissions, primarily from refrigerants and cooling energy, currently constitute 7% of global greenhouse gases.
- Projected Increase: These emissions are expected to triple by 2050 due to rising global temperatures and increased demand for cooling appliances like ACs and refrigerators.
Role of Refrigerants in Global Warming
- Transition from CFCs to HFCs and HCFCs: Initially, chlorofluorocarbons (CFCs) were used in cooling appliances but were phased out by the 1987 Montreal Protocol due to ozone depletion concerns. They were replaced by hydrofluorocarbons (HFCs) and hydrochlorofluorocarbons (HCFCs).
- Greenhouse Gas Potency: Although HFCs and HCFCs don’t harm the ozone layer, they are potent greenhouse gases, with some forms like HFC-134a having a global warming potential 3,400 times that of CO2.
Sources and Effects of HFC and HCFC Emissions
- Leakage from Appliances: These gases often leak from damaged appliances or car air conditioning systems, especially at the end of their life cycle.
- Contribution to Warming: The leakage of these gases contributes significantly to global warming, with the Climate and Clean Air Coalition (CCAC) highlighting their potency.
Challenge of Cooling Energy
- Electricity for Cooling: A significant portion of cooling emissions comes from the electricity used to power cooling appliances.
- Fossil Fuel Dependence: Much of this electricity is generated from fossil fuels, particularly in developing countries, contributing to climate change.
Vicious Cycle of Cooling Demand and Global Warming
- Feedback Loop: Rising global temperatures increase the demand for cooling, which in turn contributes to more warming.
- Growing Cooling Device Market: The number of cooling devices is expected to rise from 3.6 billion to 9.5 billion by 2050, with a potential need for 14 billion devices if cooling access is expanded globally.
Solutions and Strategies
- Kigali Amendment to the Montreal Protocol: Over 150 countries agreed in 2016 to reduce HFC consumption by 80% by 2047, potentially avoiding over 0.4 degrees Celsius of global warming by 2100.
- Promoting Climate-Friendly Refrigerants: The use of natural refrigerants with lower or zero global warming potential is being encouraged.
- Proper Disposal and Management: Effective management and disposal of refrigerants could significantly reduce CO2 emissions.
- Alternative Cooling Methods: Focusing on building designs that reduce the need for air conditioners, such as improved insulation and ventilation, is crucial.
Conclusion
- The Global Cooling Pledge represents a significant step in addressing a key contributor to climate change.
- This initiative underscores the need for global cooperation in combating the escalating challenges posed by climate change.
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